Add frozen fries. Place the fries in the fryer basket and then put the basket in the fryer and set the timer: Regular fries – 10 minutes, Crinkle Cut fries – 14 minutes, Waffle fries – 10 minutes.
HOW TO REHEAT FRENCH FRIES IN THE AIR FRYER Using an air fryer is a great way to reheat french fries. We found we got the best results with leftover fries that had been stored in an airtight container so they didn’t get stale. Simply place the fries in the basket of the air fryer and cook them at 400 degrees F for 10 minutes. Make sure to stop halfway through to toss the fries in the basket for the crispy-est results!